engineering chemistry MCQ #987

The energy of an electron in the nth orbit is given by E = -13.6 / n² eV. What is the energy of an electron in the 3rd orbit?

engineering chemistry MCQ #987

  1. Question 1

    Q1. The energy of an electron in the nth orbit is given by E = -13.6 / n² eV. What is the energy of an electron in the 3rd orbit?

    • A) -1.51 eV
    • B) -3.4 eV
    • C) -6.04 eV
    • D) -12.09 eV

    Answer: -1.51 eV

    Explanation: Using E = -13.6 / n², for n = 3, E = -13.6 / 3² = -13.6 / 9 = -1.51 eV.